Signal schickt Deine Telefonnummer an alle Deine Kontakte
When you install Signal, it asks for access to your contacts, and says
very proudly, “we don't upload your contacts, it all stays on your
phone.”
And then it spams all of your contacts who have Signal installed,
without asking your first.
And it shares your phone number with everyone in your contacts who has
Signal installed.
And then when you scream ARE YOU FUCKING KIDDING ME and delete your
account and purge the app, guess what? All those people running Signal
still have your phone number displayed for them right there in plain
text. Deleting your account does not delete the information that the
app shared without your permission.
So yeah. Real nice “privacy” app you've got there.